Eastbound DIAAH and DTR Near Herndon Station: Heavy construction work that requires the use of a large crane will be taking place during the week at night near the Herndon Metrorail Station. The crane will be positioned on the eastbound DIAAH adjacent to the station and the area will be closed to traffic. Eastbound DIAAH drivers will be detoured onto the eastbound DTR, then returned to the DIAAH beyond the location of the construction activity. The eastbound DTR will be reduced to two lanes in order to accommodate entering vehicles.

Eastbound and Westbound DIAAH Near Dulles Station: During the weekend of Feb. 16-17, overhead work on the Aerial guideway at Dulles Airport will necessitate nighttime traffic detours between the Rudder Road overpass and Saarinen Circle.

Eastbound Greenway near Ashburn Station: The tower crane currently located at the Ashburn Metrorail Station will be dismantled and moved at night during the weekend of Feb. 16-18. The activity will require the closure of the two left lanes of the eastbound Greenway in that area for reasons of safety.

See below for more specific dates, times and details and remember that all work is weather permitting.

PLEASE USE CAUTION and remain attentive to all signage, barricades and speed limits, and obey all police and flagger instructions. Slow-moving vehicles and equipment may be entering and exiting the highways and surrounding roads.

Where: From mile marker 5.7 to 1.5 (from approximately 2/10 mile after the Wiehle Avenue overpass to 3/10 mile before the Route 28 overpass)

Why: Civil work

Dulles International Airport Access Highway and Dulles Toll Road East

When: Monday, Feb. 12 - Sunday, Feb. 18, 9:30 p.m. to 5 a.m.

What: Full closure of a section of the eastbound DIAAH

Where: From milemarker 2.7 to 4.0 (Centreville Road and Fairfax County Parkway overpasses) Detour: Eastbound DIAAH traffic will be detoured onto the left lane of the eastbound Dulles Toll Road and then returned to the eastbound DIAAH beyond the construction activity. No toll will be charged to airport traffic. The detour will be removed each night and the road will be restored to operation no later than 5 a.m. each day.

Why: Herndon Station construction

Dulles International Airport Access Highway East and West

When: Friday, Feb. 16 - Saturday, Feb. 17, 9 p.m. to 5 a.m.

What: Detours on eastbound DIAAH near the Dulles Airport Main Terminal

Where: Between milemarker 0.0 and 0.4 (between Saarinen Circle and Rudder Road overpass) Detour: Beginning at 9 p.m., between mile markers 0.0 and 0.4, eastbound and westbound DIAAH traffic will be reduced to a single lane. At 10 p.m., traffic approaching the Main Terminal, will be detoured to the Aviation Drive exit, cross over Aviation Drive, and back to the westbound DIAAH at Saarinen Circle. Traffic leaving the Main Terminal will be detoured to the Aviation Drive ramp, cross over Aviation Drive and reenter the eastbound DIAAH.

Where: Lane closures will be between mile marker 7.6 and 12.0 (from Broadlands Boulevard to the end of the ramp to the eastbound Dulles Greenway MainToll Plaza), short lane closures of varying lengths will occur.

Why: Civil work

When: Thursday, Feb. 15 - Friday, Feb. 16, 8 p.m. to 5 a.m.

What: Double right lane closures

Where: Lane closures will be between mile marker 10.0 and 12.0 (between the Loudoun County Parkway overpass and Dulles Greenway Main Toll Plaza), short lane closures of varying lengths will occur.

Why: Aerial Guideway work

When: Friday, Feb. 16 - Sunday, Feb. 18, 8 p.m. to midnight

What: Double left lane closures

Where: Lane closures will be between mile marker 7.8 and 9.2 (from east of Broadlands Boulevard overpass to 7/10 mile east of the Ashburn Village Boulevard overpass.

Why: Ashburn Station tower crane removal

Dulles Greenway West

When: Monday, Feb. 12 - Friday, Feb. 16, 6 a.m. to 3 p.m.

What: Alternating right and left lane closures of varying lengths

Where: Lane closures will begin approximately 3/10 mile west of the Main Toll Plaza and end near the Broadlands Boulevard overpass

Why: Civil work

Moran Road/Lockridge Road North and South

When: Monday, Feb. 12 - Thursday, Feb. 15, 9:30 a.m. to 3:30 p.m.

Friday, Feb. 16, 9:30 a.m. to noon

What: Right lane closed

Where: From Old Ox Road to 1500 feet north of Lockridge/Moran Road intersection

Why: Civil work

Herndon Parkway East

When: Monday, Feb. 12 - Thursday, Feb. 15, 9:30 a.m. to 3:30 p.m.

Friday, Feb. 16, 9:30 a.m. to noon

What: Right lane closed

Where: From 1000 feet east of Van Buren Street to 800 feet west of Exchange Place

Why: Civil work

Old Ox Road East and West

When: Monday, Feb. 12 - Thursday, Feb. 15, 9:30 a.m. to 3:30 p.m.

Friday, Feb. 16, 9:30 a.m. to noon

What: Right lane closed

Where: From the 500 feet east of Moran Road to 500 feet west of Moran Road

Why: Civil work

Sunset Hills Road East

When: Monday, Feb. 12 - Thursday, Feb. 15, 9:30 a.m. to 3:30 p.m.

Friday, Feb. 16, 9:30 a.m. to noon

What: Right lane closed

Where: From 400 feet west of Town Center Parkway to 600 feet east of Town Center Parkway

Why: Civil work

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A 24/7 emergency hotline is available for Phase 2 Dulles Corridor Metrorail Project construction-related issues: 844-385-7245. For general project information: www.dullesmetro.com or 703-572-0506.